Band tool guide



Sept. 4, 1951 W. B. BOICE BAND TOOL GUIDE Original Filed Sept. 1, 1944 slotted disk 8.

Patented Sept. 4, 1951 BAND TOOL GUIDE William B. Boice, Toledo, Ohio, assignor to Boice- Crane Company, Toledo, Ohio, a corporation of Ohio Original application September 1, 1944, Serial No.

552,350, now Patent No. 2,431,605 dated November 25, 1947.

Divided and this application October 20, 1947, Serial No. 780,795

1 Claim. 1

This invention relates to band types of power tools, including precision service and means to conform the tool to different conditions and requirements for efficient operation.

This invention has utility when incorporated in features of guiding and directing control for the band at the region the band tool is contacted by the work to be performed. The work on the table is directed against the band as the band travels thru the table. Adjusting means are duplicated above and below the table to provide identical positioning and positive guiding control for the band tool in its approach to the work and in its course therefrom.

Referring to the drawings:

Fig. 1 is a fragmentary perspective view of an embodiment of the invention in an endless band type of power tool;

Fig. 2 is a front elevation of band guiding and control means at the region of the work, with portions of the adjustable mountings therefor removed, the scale being somewhat enlarged over the showing in Fig. 1;

Fig. 3 is a view looking down from the line III--III, Fig. 2, showing a portionof the mounting for the band guiding and controlling means as beneath the work supporting table; and

Fig. 4 is a section on an enlarged scale above the table thru the channel guide, band and a file element.

A machine frame I has therein a wheel 2 adapted to be actuated from a source of power. The wheel 2, in the lower portion of the frame I, has a flexible band 3 therefrom extending upward to pass over an upper follower wheel 4. The wheel 4 is in the upper portion of the frame I. Forwardly from the upper portion of the frame I is a front overhang 5 above a work table 6. An adjustable mounting connection I, from the underside of. the table 6, assembles the table 6 with the lower portion of the frame I Centrally on the table 6 at an opening thru the table is a The disk 8 is below a telescopic portion 9 which is adjustable relatively to the frame overhang 5. This adjustment of the portion 9 is toward and from the table 6.

Work region control From the upper wheel 4, the band 3 passes out of the overhang 5 thru the guide portion 9. A pair of bolts I0, from the guide 9 (Fig. 2), extend downward to mount a horizontally extending slide way or track II. An upwardly extending bolt I2 is thru a slot I3 in a channel slide member I4. The bolt I2 engages the track II, and as way I5. A bolt I6 (Figs. 2,3), in a slot H of a slide bracket I8, engages the way I5 and, as tightened, locks the bracket I8 therein. The slot I1 is at right angles to the slot I3 at these hori-.

zontally extending adjusting means or slides. The travel direction of the band 3 as to the table 5 is vertical.

To the left of the slide I8 (Fig. 2) there is therefrom a downwardly extending channel I9. Screws 28 anchor a vertically extending guide channel 2| to be seated in the channel I9 and project thru the work table 6. The upper or band entrance end of the guide 2I has a flare portion 22 adapted to direct the band 3 to ride centrally of the guide 2I in the downward course of the band 3 toward the table 6. The clearance, upward from the table 6 for the mounting and adjusting means for the guide ZI, may be varied by sliding the portion 9 in and out as to the frame overhang 5. At the desired position for the portion 9, a clamp 23 (Fig. 1) may be'operated to hold firmly the portion 9 in the frame overhang 5.

The guide 2I (Fig. 4) is of width approximating that of a file element 24, its liner 25 and the band 3. This means that work, moved directly against face 26 of the traveling element 24, does not directly contact the guide 2|.

In some operations, the workman may progress the work sidewise during the engagement of the work with the file elements 24. Rivet ends 21 and plate 28 ride in the channel of the guide 2|, and thereby provide lug means to restrain the band 3 from responding to any pressure tending to shift the band 3 out of its straight line travel direction as held by the guide 2 I.

From below the table 5, the table-mounting bracket I (Figs. 1, 2) has bolts I0 anchor a horizontally extending slide way or track II, A

downwardly extending bolt I2 is thru a slot I3 of v a channel slide I4 astride the track II. Upon loosening the bolt I 2, the member or downwardly open channel I4 may be adjusted along the track II relatively to the bracket I. The normal adiusted position for the end of the channel I4 as to the track I I. so positions the member I4 to have its upwardly open channel or guide way l5 directly crosswise from the direction of the track II. A downwardly directed bolt I6 is thru a slot I! of a secondary slide member I8. The bolt I6, as tightened, locks the member I8 to the primary slide member I 4. Accordingly, as slackened, the

bolt I6, may release the member 18 for a desired adjustment. The member l8, from below the table 6, instead of carrying the channel [9, has a reversal thereof in an upwardly directed channel portion 29. r

The mounting from the bolts I at the portion 9 and from the bolts I!) from the brackets 1, are of identity in adjustment features for locating the channel 29 in aligmnent with the upper channel I9, so that the lower portion of the guide 2i may have telescopic fit in the channel 29 in response to up and down adjustment of the telescopic portion 9. The similar dual crosswise adjustments for the channels I9, 29, and the guide 2| directed thereby, may locate the downward travel reach of the endless band 3 in a disturbance minimizing relation as to the wheels 4, 2.

This case is a Division of this applicants Patent 2,431,605, November 25, 1947, Endless Band Tool, filed September 1, 1944.

What is claimed and it is desired to secure by Letters Patent is:

A band tool having a frame, a table having an aperture and mounted on said frame, a band passing through said table aperture, a portion of said frame overhanging said table, telescoping means extending from said overhanging portion towards said table, an elongated guide track mounted on said telescopic means, a first mounting means having an elongated guide channel for receiving said guide track for slidable movement therealong, slot and bolt connection to said track for locking said first mounting means in adjustment, a second elongated guide channel on said mounting means at right angles to said first guide channel, both said elongated guide channels being parallel to said table, a second mounting means having a second guide track adjustably slidable in said second guide channel, second slot and bolt means for holding said second mounting means in adjustable position, an elongated guide for said band having one end secured to said second mounting means, said band passing through said table aperture, and a twp'way adjustable means slidably receiving and mounting the other end of said band guide.

WILLIAM B. BOICE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,180,079 Wilkie Nov. 14, 1939 2,204,840 Wilkie June 18, 1940 2,261,816v Williams Nov, 4, 1941 FOREIGN PATENTS Number Country Date 541,823 Great Britain Dec. 12, 1941 

